H2O2 산화제를 이용한 δ-FeOOH의 합성과 입자 크기 제어

Abstract

In this study, Iron (III) oxide-hydroxide (δ-FeOOH) was successfully synthesized using hydrogen peroxide (H2O2) as an oxidizing agent. The synthesis of δ-FeOOH was carried out by controlling the amount of H2O2, and pure δ-FeOOH was successfully synthesized in ranges from 0.2 mL to 0.6 mL of H2O2. The size of the synthesized δ-FeOOH particles was compared by controlling the amount of oxidant H2O2. The average particle size of the synthesized pure δ-FeOOH particles increased from 875.1 nm to 897.2 nm as the amount of H2O2 was increased. The optical properties of δ-FeOOH synthesized under these specific conditions were investigated. All δ-FeOOH showed a similar trend of increasing and decreasing light absorption from 800 nm to 400 nm, although there was a slight difference in the amount of light absorption, with the largest amount of light absorption at 410 nm. The band gap energy of δ-FeOOH through the Tauc plot method was about 2.1~2.2 eV when H2O2 was 0.2~1.4 mL. With a sufficient small particle size, simple control of that particle size, and a small band gap energy enough to absorb light in the visible spectrum, δ-FeOOH could be useful in a variety of applications, including photoelectrochemistry and battery electrodes.